WO2015130017A1 - Battery cell comprising circumferential surface sealing part having sealing line, and battery cell sealing device for producing same - Google Patents

Battery cell comprising circumferential surface sealing part having sealing line, and battery cell sealing device for producing same Download PDF

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Publication number
WO2015130017A1
WO2015130017A1 PCT/KR2015/000950 KR2015000950W WO2015130017A1 WO 2015130017 A1 WO2015130017 A1 WO 2015130017A1 KR 2015000950 W KR2015000950 W KR 2015000950W WO 2015130017 A1 WO2015130017 A1 WO 2015130017A1
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WO
WIPO (PCT)
Prior art keywords
sealing
battery cell
line
lines
battery
Prior art date
Application number
PCT/KR2015/000950
Other languages
French (fr)
Korean (ko)
Inventor
유정우
엄인성
김제영
Original Assignee
주식회사 엘지화학
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 엘지화학 filed Critical 주식회사 엘지화학
Priority to CN201580010855.5A priority Critical patent/CN106062992B/en
Priority to EP15754570.8A priority patent/EP3098877B1/en
Priority to US15/121,914 priority patent/US10622597B2/en
Priority to JP2016553627A priority patent/JP6407297B2/en
Publication of WO2015130017A1 publication Critical patent/WO2015130017A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0404—Machines for assembling batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0436—Small-sized flat cells or batteries for portable equipment
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/105—Pouches or flexible bags
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/117—Inorganic material
    • H01M50/119—Metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/121—Organic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/131—Primary casings; Jackets or wrappings characterised by physical properties, e.g. gas permeability, size or heat resistance
    • H01M50/136—Flexibility or foldability
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/184—Sealing members characterised by their shape or structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • H01M50/557—Plate-shaped terminals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/22—Heated wire resistive ribbon, resistive band or resistive strip
    • B29C65/221—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip
    • B29C65/222—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip comprising at least a single heated wire
    • B29C65/223—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip comprising at least a single heated wire comprising several heated wires
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/82—Testing the joint
    • B29C65/8253—Testing the joint by the use of waves or particle radiation, e.g. visual examination, scanning electron microscopy, or X-rays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/03—After-treatments in the joint area
    • B29C66/032—Mechanical after-treatments
    • B29C66/0324—Reforming or reshaping the joint, e.g. folding over
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/133—Fin-type joints, the parts to be joined being flexible
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/23—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations
    • B29C66/232—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations said joint lines being multiple and parallel, i.e. the joint being formed by several parallel joint lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/433—Casing-in, i.e. enclosing an element between two sheets by an outlined seam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72321—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81431—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
    • B29L2031/3468—Batteries, accumulators or fuel cells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7146—Battery-cases
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/548—Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention relates to a battery cell including an outer circumferential sealing portion in which a sealing line is formed, and a battery cell sealing apparatus for producing the same.
  • Such secondary batteries can be classified into cylindrical battery cells, rectangular battery cells, pouch-type battery cells and the like according to their shape.
  • a pouch-type battery cell that can be stacked with high integration, has a high energy density per weight, and is easy to deform, has attracted much attention.
  • Such a pouch type battery is also referred to as a lithium ion polymer battery because an electrode assembly embedded therein is frequently used as an electrode assembly impregnated with a lithium electrolyte in a state in which a cathode and an anode are thermally fused to a separator.
  • FIG. 1 is a schematic exploded perspective view of a general structure of a typical representative pouch type secondary battery.
  • the pouch type secondary battery 100 may include two stacked electrode assemblies 30 to which the plurality of electrode tabs 31 and 32 protrude, and two electrode tabs 31 and 32 respectively connected to the electrode tabs 31 and 32. And a battery case 20 having a structure for accommodating and sealing the stacked electrode assembly 30 while allowing the electrode leads 41 and 42 and a portion of the electrode leads 41 and 42 to be exposed to the outside. It is.
  • the battery case 20 seals the stacked electrode assembly 30 as a cover of the lower case 21 and a lower case 21 including a concave shape receiving portion 23 into which the stacked electrode assembly can be seated. It consists of an upper case 22.
  • the upper case 22 and the lower case 21 are heat-sealed in a state where the stacked electrode assembly 30 is embedded, thereby forming a sealing portion 24.
  • FIG. 2 illustrates a perspective view of a conventional pouch type secondary battery 110 in which an electrode assembly 101 is sealed after being received, and sealing portions 104 and 105 having electrode tabs 106 and 107 protruding therefrom.
  • the entirety of the side sealing parts 102 and 103 is heat-sealed, including).
  • sealing is very important in order to secure sealing property, insulation resistance, and the like, and especially in the case of a medium-large battery, since the internal capacity is largely required, the sealing part is also widened, which requires an additional process. Therefore, in order to reduce unnecessary space, the method of bending the remaining area after sealing is applied, but there is a problem that the mechanical processing of the sealed pouch is not easy.
  • the present invention aims to solve the problems of the prior art as described above and the technical problems that have been requested from the past.
  • a sealing line is continuously formed from the outer peripheral end of the upper sealing part to the outer peripheral end of the lower sealing part in the longitudinal direction of the battery case.
  • Still another object of the present invention is to provide a battery cell sealing apparatus including a sealing tool in which linear protrusions forming sealing lines are formed to enable the manufacture of the battery cell as described above.
  • the electrode assembly is mounted on a battery case of a laminate sheet including a resin layer and a metal layer, and the battery case has a heat sealing seal (outer peripheral surface sealing part) for sealing the battery case on the outer circumferential surface of the housing part in which the electrode assembly is mounted.
  • the electrode terminals are located in the upper sealing portion, or the lower sealing portion, or the upper and lower sealing portions, at least one of both side sealing portions adjacent to the upper or lower sealing portion, spaced apart from each other in parallel to each other
  • Two or more sealing lines are formed, and the sealing lines are continuously formed from the outer circumferential end of the upper sealing part to the outer circumferential end of the lower sealing part in the longitudinal direction of the battery case, and the outer circumferential surface sealing part in which the sealing lines are formed is a sealing line. Bends in the range of 30 to 180 degrees.
  • the battery cell according to the present invention includes two or more sealing lines parallel to the side sealing portion of the pouch-type battery case at intervals, that is, bends are formed between the sealing lines, that is, in the non-fused or low welded portions.
  • the edge sealing portion of the battery case can be smoothly bent, and thus the position of the bent portion can be accurately set and processed, and as a result, the process error can be greatly reduced.
  • the portion with the sealing line is located on the outer surface of the storage portion of the battery case without folding can achieve the effect of reducing the volume of the battery.
  • the battery cell according to the present invention is a battery cell in which a heat-sealed sealing part for sealing a battery case is formed on an outer circumferential surface of an accommodating part in which an electrode assembly is mounted. It consists of a plate-like structure.
  • the battery case has a sheet-like structure including a resin layer and a metal layer for the purpose of preventing water penetration, preventing leakage of an electrolyte solution, and providing airtightness during sealing.
  • the battery case may be composed of a laminate sheet including a metal layer and a resin layer, the first case is formed with an accommodating portion for accommodating the electrode assembly, and a structure covering the accommodating portion, the outer peripheral surface of the first case It may be composed of a second case which is heat-sealed and sealed with the outer peripheral surface of the.
  • each of the first case and the second case may be independent members or one unit member having one end coupled thereto.
  • Representative examples of such laminate sheets include aluminum laminate sheets having resin layers formed on both outer surfaces thereof.
  • sealing lines are formed on an outer circumferential side sealing portion of the battery case.
  • a certain width must be formed between the sealing lines.
  • the shape of the sealing line is not particularly limited, but is preferably parallel to the outer circumferential surface of the housing part. It can be made in one straight shape.
  • the widths of the sealing lines may be formed to be identical to each other.
  • the bent portion may be accurately set and processed, thereby greatly reducing the process error.
  • the width of the sealing lines is preferably narrower than the height of the accommodating portion, in one specific example, the width of the sealing lines is relatively of the inner sealing line
  • the width may be formed wider than the width of the outer sealing line, on the contrary, the width of the outer sealing line may be formed relatively wider than the width of the inner sealing line.
  • the width of each of the sealing lines may be variously configured in consideration of the number of bendings, the bending direction, the thickness of the laminate sheet, and the like, 10% based on the width of the outer circumferential surface sealing portion where the sealing lines are formed. And may be appropriately selected within a size of 45%. However, if the width of the sealing line is less than 10% based on the width of the sealing portion, the sealing strength may be deteriorated and safety may be a problem. If the width is larger than 45%, it is difficult to achieve the effect of reducing the volume of the battery due to easy bending of the sealing portion. Not.
  • the separation distance of the sealing lines is preferably narrower than the width of the sealing line, specifically, may be 10% to 100% of the size of the average width of the sealing lines, the average of the sealing lines If the width is less than 10%, it is difficult to bend easily due to the thickness of the laminate sheet, and if it is greater than 100%, it is not preferable because it is difficult to accurately set and process the bent portion.
  • the sealing line portion is a portion where heat fusion has occurred, the sealing portion is bent in the portion between the sealing line, the portion between the sealing line may form an unsealed portion in which the heat fusion does not occur.
  • the sealing line and the unfused portion are repeatedly formed, and thus the sealing line has a thinner thickness at the vertical end portion than the unfused portion due to the pressure caused by the heat welding.
  • the inner sealant layer of the battery case is melted by a high temperature and pressure to seal the bar, the molten inner sealant layer is a sealing line Flowing between them may result in weak strength fusion. Therefore, a low fusion portion having a low heat fusion degree may be formed between the sealing lines as compared with the sealing line.
  • the heat fusion degree of the low fusion portion may be appropriately selected within the range of 5% to 90% size with respect to the heat fusion degree of the sealing line.
  • the thermal fusion degree of the low fusion portion is greater than 90% of the thermal fusion degree of the sealing line, to achieve the object of the present invention to easily bend the outer peripheral surface sealing portion at the low fusion between the sealing lines It is not desirable because it is difficult.
  • the sealing line requires a higher welding strength in order to prevent the sealing property from deteriorating due to the formation of the low welding portion, the heat welding temperature of the sealing line is higher than the heat welding temperature of the low welding portion Can be formed.
  • the number of sealing lines may be formed in two or more according to the purpose of use and the object of use of the battery cell, in order not to reduce the sealing property in consideration of safety from electrolyte leakage, etc. It is preferable that it is formed in the outermost part of a payment outer peripheral surface and the outer peripheral surface of a sealing part.
  • the sealing lines include a first sealing line, a second sealing line and a third sealing line in an order adjacent to a receiving portion, and a first bending line between the first sealing line and the second sealing line. And a second bent portion between the second sealing line and the third sealing line.
  • the third sealing line may be bent such that the third sealing line faces the second sealing line
  • the second sealing line may be bent by 180 degrees in the direction of the storage part in the second bending part, and thus the second sealing line may be adjacent to the second sealing line. Face to face.
  • the sealing part may be bent two or more times in order to reduce the volume of the battery cell.
  • the first bent part is provided with an opposing surface of the third sealing line with respect to the second sealing line. It may be bent to face the side of the.
  • the present invention also provides a device for sealing the outer peripheral surface of the battery cell,
  • An upper sealing tool for applying high temperature while pressing down the upper surface of the sealing portion of the outer circumferential surface of the battery case
  • It includes a lower sealing tool (sealing tool) for supporting the lower surface of the outer peripheral surface sealing scheduled portion of the battery case,
  • At least one of the upper sealing tool and the lower sealing tool has a structure in which two or more linear protrusions forming sealing lines are formed on the outer circumferential sealing portion.
  • the sealing device having the structure as described above may serve to apply heat not only to the upper sealing tool but also to the lower sealing tool, and at the time of thermal fusion of the battery case, sealing the outer circumferential surface of the battery cell in the form of linear protrusions formed in the sealing tool.
  • a sealing line in the portion it is possible to provide a battery cell that is easy to bend the sealing portion between the sealing lines.
  • the linear protrusions may be flat or curved at the end contacting the outer circumferential sealing part on a vertical cross section, and considering the sealing property of the sealing part, the flat end may be appropriate, and due to melting and flowing down of the inner sealant layer, Curved ends may be appropriate, given the prevention of low fusion formation.
  • the present invention also provides a device for sealing the outer peripheral surface of the battery cell,
  • An upper sealing tool for applying high temperature while pressing down the upper surface of the sealing portion of the outer circumferential surface of the battery case
  • It includes a lower sealing tool (sealing tool) for supporting the lower surface of the outer peripheral surface sealing scheduled portion of the battery case,
  • At least one of the upper sealing tool and the lower sealing tool has a structure in which two or more linear hot wires forming sealing lines are formed in the outer peripheral sealing portion.
  • the sealing device having the above structure can serve to apply heat not only to the upper sealing tool but also to the lower sealing tool, and has the same purpose as the sealing device in which the linear protrusions are formed on the sealing tool, and have the same effect.
  • the linear hot wires in the position where the linear protrusions are formed, it is possible to heat fusion at a high temperature only to the sealing line, and it is easier to set and adjust the heat fusion temperature.
  • even without the formation of a separate linear protrusion it is possible to achieve the effect of the present invention more easily by adding a hot wire to the sealing tool.
  • the present invention also provides a battery module including the battery cell as a unit battery, and provides a battery pack including the battery module.
  • the present invention also provides a device including the battery pack as a power source.
  • the battery pack may be used as a power source for devices requiring high temperature stability, long cycle characteristics, high rate characteristics, and the like, and specific examples of such devices include smartphones, mobile phones, laptops, tablet computers, notebook computers, or batteries.
  • a power tool driven by a base motor and moving Electric vehicles including electric vehicles (EVs), hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (PHEVs), and the like; Electric motorcycles including electric bicycles (E-bikes) and electric scooters (E-scooters); Electric golf carts; It may be selected from the system for power storage, but is not limited thereto.
  • FIG. 1 is an exploded perspective view of a typical representative pouch type secondary battery
  • FIG. 2 is a perspective view showing a sealing state of a conventional pouch type secondary battery
  • FIG. 3 is a perspective plan view of a battery cell in which a sealing line is formed according to one embodiment of the present invention
  • FIG. 4 is an enlarged view of a portion A in FIG. 3;
  • FIG. 5 is a vertical cross-sectional view of the line B-B in FIG. 4;
  • FIG. 6 is an enlarged view of a conventional pouch type secondary battery and its sealing portion and an enlarged photograph of a sealing portion of a battery cell according to an embodiment of the present invention
  • FIG. 7 is a partial front view of a pouch-type battery cell according to an embodiment of the present invention.
  • FIG. 8 is a comparison photograph after bending of a conventional pouch-type secondary battery and a battery cell according to an embodiment of the present invention.
  • FIG. 9 is a front view of a sealing apparatus according to one embodiment of the present invention.
  • FIG. 10 is a front view of a sealing apparatus according to another embodiment of the present invention.
  • FIG. 2 illustrates a battery cell in which a sealing line according to an embodiment of the present invention is formed.
  • FIG. 2 illustrates a pouch-type battery cell having a structure in which electrode terminals having a structure in which electrode tabs and electrode leads are connected to one end and the other end, respectively, but also have a pouch-type battery cell in which electrode terminals are formed together at one end. Of course it is included.
  • the battery cell 200 has a heat-sealed sealing part for sealing the battery case on the outer circumferential surface of the accommodating part 201 in which the electrode assembly is mounted, and the electrode terminals 210 and 220.
  • Two or more sealing lines 230 are formed.
  • the sealing lines 230 are continuously formed in the longitudinal direction of the battery case from the outer peripheral end of the upper sealing part 204 to the outer peripheral end of the lower sealing part 205.
  • the sealing lines are not limited to the length corresponding to the length of the receiving portion but extend to the outer peripheral ends of the upper and lower sealing portions. It is preferable.
  • FIG. 4 is an enlarged view of portion A of FIG. 3.
  • a plurality of sealing lines are formed in a straight shape on the outer circumferential side sealing part of the battery case accommodating part 201.
  • the sealing lines may be alternately positioned in the heat-sealed portion 232 and the non-fused portion 231 which is not heat-sealed alternately, the un-fused portion may be a portion in which no fusion occurs at all, but the sealing line It may be a low fusion portion having a low thermal fusion in comparison with the above.
  • the width L of all the sealing lines may be the same or may be different.
  • the width of the inner sealing line formed on the accommodating portion 201 side may be wider than the width of the outer sealing line, and conversely, the width of the outer sealing line may be wider than the width of the inner sealing line. If all the sealing lines have the same width, there is an advantage that the area uniformity of the sealing portion can be easily evaluated through the number inspection of the sealing lines in the quality inspection process after fabrication of the cell, but the thickness of the laminate sheet and the sealing portion width Considering the number of bends considered, the width of the sealing lines can be differentiated.
  • the width of each of the sealing lines may be appropriately selected in the size of 10% to 45% based on the width W of the outer peripheral surface sealing portion in which the sealing lines are formed.
  • the sealing portion since the bending of the sealing portion occurs between the sealing lines, it is appropriate that this portion is formed relatively thin, preferably, the distance between the sealing lines (L and L between the unmelted portion or the low fused portion width) ) May be narrower than the width of the sealing line, specifically, may be formed in a size of 10% to 100% with respect to the average width of the sealing lines.
  • Figure 5 shows a vertical cross-sectional view in the case of cutting along the line BB of Figure 4, the sealing line portion 232 in which the heat fusion has been relatively thin in the vertical cross-section of the outer peripheral surface of the sealing portion, sealing line It can be seen that the non-fused portion or the low fusion portion 231 is relatively thick in thickness.
  • Figure 6 shows a conventional pouch-type secondary battery (a) and its sealing portion enlarged picture (b) and the sealing portion enlarged picture (c) of the battery cell according to an embodiment of the present invention, the conventional Although the surface of a sealing part is smoothly represented in the sealing part enlarged photograph (b), in this invention (c) which formed the sealing line, the unfused part or the low fusion part which forms a linear sealing line is alternately represented repeatedly.
  • FIG. 7 illustrates a bending process of a pouch-type battery cell according to an embodiment of the present invention.
  • the sealing lines generated in the side sealing part include the first sealing line 311, the second sealing line 312, and the third sealing line 313 in the order adjacent to the housing 310.
  • a first bent portion 321 between the first sealing line 311 and a second sealing line 312, and a second bent portion between the second sealing line 312 and the third sealing line 313. 322 is included.
  • the third sealing line 313 faces the second sealing line 312 due to the bending at the second bent portion 322, and the first bent state in which the second bent portion 322 is bent.
  • the portion 321 is bent such that an opposing surface of the third sealing line 313 with respect to the second sealing line 312 faces the receiving portion 330. In this way, the unnecessary sealing portion can be bent one or two times, thereby solving the problem of increasing the volume of the battery cell.
  • Figure 8 shows a comparison photo of the conventional pouch-type battery cell (a) and the battery cell (b) according to an embodiment of the present invention, as shown in the present invention to seal the heat fusion to only a part of the sealing portion In the case of forming a line, it is possible to obtain the effect of folding the sealing unit uniformly and compactly in the bending step of the battery cell.
  • an apparatus 600 for sealing an outer circumferential surface of a battery cell includes an upper sealing tool 611 and a lower sealing tool 612, and the upper sealing tool 611 includes an outer circumferential surface of a battery case. It serves to apply a high temperature while pressing down the upper surface of the sealing scheduled portion 620, the lower sealing tool 612 may support a lower surface of the outer peripheral sealing plan portion, and may also serve to apply heat. At least one of the upper sealing tool 611 and the lower sealing tool 612 is formed with two or more linear protrusions 631.
  • the linear protrusions 631 may protrude toward the outer circumferential surface sealing plan portion 620 of the battery case, and an end portion which contacts the outer circumferential surface sealing plan portion on a vertical cross section may be formed flat or curved.
  • protrusions are formed by the melting of the sealant layer 623. Sealing is made inside the portion that meets the sealing of the.
  • the sealing apparatus 700 illustrated in FIG. 10 includes an upper sealing tool 711 and a lower sealing tool 712, and the upper sealing tool 711 of the outer peripheral sealing plan portion 720 of the battery case is included. It serves to apply a high temperature while pressing the upper surface downward, the lower sealing tool 712 may support the lower surface of the outer peripheral sealing plan portion, and may also serve to apply heat. At least one of the upper sealing tool 711 and the lower sealing tool 712 is embedded with two or more linear hot wires 731. The heating wire may be embedded in the sealing tool, but may be located on the surface of the sealing tool in order to form a sealing line having a higher safety by applying a particularly high temperature to the sealing line.
  • the sealing apparatus 700 When sealing using the sealing apparatus 700, among the resin layer 721, the metal layer 722 and the sealant layer 723 constituting the laminate sheet, the hot wires due to the melting of the sealant layer 723, the battery case Sealing is made inside the portion that meets the sealing of the.
  • the battery cell according to the present invention is formed by forming two or more sealing lines spaced apart from each other in at least one of the upper sealing portion on which the electrode terminals are located or both side sealing portions adjacent to the lower sealing portion.
  • the sealing part is bent at the unfused part not welded between the lines, and the other part is located on the outer surface of the battery case without being folded, which can be easily bent and can reduce the battery volume. .
  • the present invention can be easily made bending of the sealing portion in the sealing line, it is possible to accurately set the position of the bending portion and processing can greatly reduce the process error, the number inspection of the sealing line in the quality inspection process after the cell fabrication The area uniformity of the sealing can also be easily assessed, improving the accuracy and speed of the process.

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  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
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Abstract

As described above, provided is a battery cell according to the present invention having an electrode assembly mounted in a battery case of a laminate sheet comprising a resin layer and a metal layer, having a thermal fusion sealing part (outer circumferential surface sealing part) in the battery case, for sealing the battery case, formed on the outer circumferential surface of an accommodation part in which the electrode assembly is mounted, and is characterized by: electrode terminals positioned at an upper-end sealing part, a lower-end sealing part or the upper-end and lower-end sealing parts; two or more sealing lines spaced apart so as to be parallel and formed on at least one of both side-surface sealing parts adjacent to the upper-end or lower-end sealing part; the sealing lines continuously formed in the longitudinal direction of the battery case from the outer circumferential end portion of the upper-end sealing part to the outer circumferential end portion of the lower-end sealing part; and the outer circumferential surface sealing part, on which the sealing lines are formed, bent in a range of 30° to 180° between the sealing lines.

Description

실링 라인이 형성되어 있는 외주면 실링부를 포함하는 전지셀, 및 이를 생산하기 위한 전지셀 실링장치Battery cell including an outer circumferential sealing portion is formed with a sealing line, and a battery cell sealing apparatus for producing the same
본 발명은 실링 라인이 형성되어 있는 외주면 실링부를 포함하는 전지셀, 및 이를 생산하기 위한 전지셀 실링장치에 관한 것이다.The present invention relates to a battery cell including an outer circumferential sealing portion in which a sealing line is formed, and a battery cell sealing apparatus for producing the same.
모바일 기기에 대한 기술 개발과 수요가 증가함에 따라 에너지원으로서의 이차전지의 수요가 급격히 증가하고 있고, 특히, 이차전지 중 높은 에너지 밀도와 방전 전압을 갖는 리튬 이차전지에 대해 많은 연구 및 상용화가 이루어지고 있다.As the development and demand for mobile devices increases, the demand for secondary batteries as energy sources is rapidly increasing. In particular, many researches and commercializations have been made on lithium secondary batteries having high energy density and discharge voltage among secondary batteries. have.
대표적으로 전지의 형상 면에서는 얇은 두께로 휴대폰 등과 같은 제품들에 적용될 수 있는 각형 이차전지와 파우치형 이차전지에 대한 수요가 높고, 재료 면에서는 높은 에너지 밀도, 방전 전압, 출력 안정성의 리튬 이온 전지, 리튬 이온 폴리머 전지 등과 같은 리튬 이차전지에 대한 수요가 높다.Representatively, there is a high demand for rectangular secondary batteries and pouch secondary batteries that can be applied to products such as mobile phones with a thin thickness in terms of shape of batteries, and lithium ion batteries with high energy density, discharge voltage and output stability in terms of materials. There is a high demand for lithium secondary batteries such as lithium ion polymer batteries.
이러한 이차전지는, 그것의 형상에 따라 원통형 전지셀, 각형 전지셀, 파우치형 전지셀 등으로 구분할 수 있다. 그 중에서도 높은 집적도로 적층될 수 있고 중량당 에너지 밀도가 높으며 저렴하고 변형이 용이한 파우치형 전지셀이 많은 관심을 모으고 있다.Such secondary batteries can be classified into cylindrical battery cells, rectangular battery cells, pouch-type battery cells and the like according to their shape. Among them, a pouch-type battery cell that can be stacked with high integration, has a high energy density per weight, and is easy to deform, has attracted much attention.
이러한 파우치형 전지는 그것에 내장되는 전극조립체로서 분리막에 양극과 음극이 열융착된 상태에서 리튬 전해질이 함침된 전극 조립체가 많이 사용되는 관계로 리튬이온 폴리머 전지로 칭하기도 한다.Such a pouch type battery is also referred to as a lithium ion polymer battery because an electrode assembly embedded therein is frequently used as an electrode assembly impregnated with a lithium electrolyte in a state in which a cathode and an anode are thermally fused to a separator.
도 1에는 종래의 대표적인 파우치형 이차전지의 일반적인 구조를 분해 사시도로서 모식적으로 도시하고 있다.FIG. 1 is a schematic exploded perspective view of a general structure of a typical representative pouch type secondary battery.
도 1을 참조하면, 파우치형 이차전지(100)는, 다수의 전극 탭들(31, 32)이 돌출되어 있는 스택형 전극조립체(30), 전극 탭들(31, 32)에 각각 연결되어 있는 두 개의 전극 리드들(41, 42), 및 전극 리드들(41, 42)의 일부가 외부로 노출되도록 하면서 스택형 전극조립체(30)를 수납 및 밀봉하는 구조의 전지케이스(20)를 포함하는 것으로 구성되어 있다.Referring to FIG. 1, the pouch type secondary battery 100 may include two stacked electrode assemblies 30 to which the plurality of electrode tabs 31 and 32 protrude, and two electrode tabs 31 and 32 respectively connected to the electrode tabs 31 and 32. And a battery case 20 having a structure for accommodating and sealing the stacked electrode assembly 30 while allowing the electrode leads 41 and 42 and a portion of the electrode leads 41 and 42 to be exposed to the outside. It is.
전지케이스(20)는 스택형 전극조립체가 안착될 수 있는 오목한 형상의 수납부(23)를 포함하는 하부 케이스(21)와 그러한 하부 케이스(21)의 덮개로서 스택형 전극조립체(30)를 밀봉하는 상부 케이스(22)로 이루어져 있다. 상부 케이스(22)와 하부 케이스(21)는 스택형 전극 조립체(30)를 내장한 상태에서 열융착되어, 실링부(24)를 형성한다.The battery case 20 seals the stacked electrode assembly 30 as a cover of the lower case 21 and a lower case 21 including a concave shape receiving portion 23 into which the stacked electrode assembly can be seated. It consists of an upper case 22. The upper case 22 and the lower case 21 are heat-sealed in a state where the stacked electrode assembly 30 is embedded, thereby forming a sealing portion 24.
도 2는 종래의 파우치형 이차전지(110)에 있어서, 전극조립체(101)를 수납 후 실링한 상태의 사시도를 도시하고 있는바, 전극 탭들(106, 107)이 돌출된 실링부들(104, 105)를 포함하여 측면 실링부들(102, 103) 전체가 열융착 실링되어 있다.2 illustrates a perspective view of a conventional pouch type secondary battery 110 in which an electrode assembly 101 is sealed after being received, and sealing portions 104 and 105 having electrode tabs 106 and 107 protruding therefrom. The entirety of the side sealing parts 102 and 103 is heat-sealed, including).
파우치형 이차전지의 경우, 밀봉성, 절연 저항 등을 확보하기 위하여 실링이 매우 중요하고, 특히 중대형 전지의 경우 내부 용량이 크게 요구되기 때문에 실링부 또한 넓어지게 되며 이를 위해서는 추가적인 공정이 필요하다. 따라서, 불필요한 공간을 줄이기 위해서 실링 후 남는 면적을 절곡하는 방식을 적용하고 있으나, 실링된 파우치의 기계적 가공이 쉽지 않다는 문제점이 있다.In the case of the pouch type secondary battery, sealing is very important in order to secure sealing property, insulation resistance, and the like, and especially in the case of a medium-large battery, since the internal capacity is largely required, the sealing part is also widened, which requires an additional process. Therefore, in order to reduce unnecessary space, the method of bending the remaining area after sealing is applied, but there is a problem that the mechanical processing of the sealed pouch is not easy.
따라서, 상기 문제를 해결하고, 파우치형 이차전지의 실링부의 절곡을 접는 경우에 나타나는 문제점 또한 해결할 수 있는 기술에 대한 필요성이 높은 실정이다.Therefore, there is a high need for a technology that can solve the above problems and also solve the problems that occur when folding the sealing portion of the pouch type secondary battery.
본 발명은 상기와 같은 종래기술의 문제점과 과거로부터 요청되어온 기술적 과제를 해결하는 것을 목적으로 한다.The present invention aims to solve the problems of the prior art as described above and the technical problems that have been requested from the past.
본 출원의 발명자들은 심도 있는 연구와 다양한 실험을 거듭한 끝에, 이후 설명하는 바와 같이, 전지케이스의 길이방향으로 상단 실링부의 외주 단부로부터 하단 실링부의 외주 단부까지 연속적으로 실링 라인이 형성되고, 상기 실링 라인들 사이에 융착이 되지 않는 미융착부 또는 저융착부를 구성하여, 상기 미융착부 또는 저융착부에서 실링부의 절곡이 이루어 질 수 있도록 함으로써, 전지케이스의 가장자리 실링부를 원활하게 절곡할 수 있도록 구조가 개선된 전지셀을 완성하기에 이르렀다.The inventors of the present application, after repeated in-depth study and various experiments, as described later, a sealing line is continuously formed from the outer peripheral end of the upper sealing part to the outer peripheral end of the lower sealing part in the longitudinal direction of the battery case. By constructing a non-fused portion or a low fusion portion that is not fused between the lines to bend the sealing portion at the non-fused portion or the low fusion portion, the structure to smoothly bend the edge sealing portion of the battery case Came to complete the improved battery cell.
본 발명의 또 다른 목적은 상기와 같은 전지셀의 제조가 가능할 수 있도록 실링 라인들을 형성하는 선형 돌기들이 형성되어 있는 실링 툴을 포함하는 전지셀 실링 장치를 제공하는 것이다.Still another object of the present invention is to provide a battery cell sealing apparatus including a sealing tool in which linear protrusions forming sealing lines are formed to enable the manufacture of the battery cell as described above.
이러한 목적을 달성하기 위한 본 발명에 따른 전지셀은,Battery cell according to the present invention for achieving this object,
수지층과 금속층을 포함하는 라미네이트 시트의 전지케이스에 전극조립체가 장착되어 있고, 상기 전지케이스에는 전극조립체가 장착되는 수납부의 외주면에 전지케이스의 밀봉을 위한 열융착 실링부(외주면 실링부)가 형성되어 있는 전지셀로서, 전극 단자들은 상단 실링부, 또는 하단 실링부, 또는 상단 및 하단 실링부에 위치하고 있고, 상기 상단 또는 하단 실링부에 인접한 양 측면 실링부들 중의 적어도 하나에는, 상호 평행하도록 이격되어 있는 둘 이상의 실링 라인들이 형성되어 있으며, 상기 실링 라인들은 전지케이스의 길이 방향으로 상단 실링부의 외주 단부로부터 하단 실링부의 외주 단부까지 연속적으로 형성되고, 상기 실링 라인들이 형성되어 있는 외주면 실링부는 실링 라인들 사이에서 30도 내지 180도의 범위로 절곡된다.The electrode assembly is mounted on a battery case of a laminate sheet including a resin layer and a metal layer, and the battery case has a heat sealing seal (outer peripheral surface sealing part) for sealing the battery case on the outer circumferential surface of the housing part in which the electrode assembly is mounted. As the battery cell is formed, the electrode terminals are located in the upper sealing portion, or the lower sealing portion, or the upper and lower sealing portions, at least one of both side sealing portions adjacent to the upper or lower sealing portion, spaced apart from each other in parallel to each other Two or more sealing lines are formed, and the sealing lines are continuously formed from the outer circumferential end of the upper sealing part to the outer circumferential end of the lower sealing part in the longitudinal direction of the battery case, and the outer circumferential surface sealing part in which the sealing lines are formed is a sealing line. Bends in the range of 30 to 180 degrees.
즉, 본 발명에 따른 전지셀은, 파우치형 전지케이스의 측면 실링부에 둘 이상의 실링 라인들을 간격을 두고 평행하게 구비하고, 상기 실링 라인들 사이에서 즉 미융착부 또는 저융착부에서 절곡이 이루어지도록 함으로써, 전지케이스의 가장자리 실링부를 원활하게 절곡할 수 있으며, 이로 인해 절곡부의 위치를 정확하게 설정 및 가공이 가능한 바, 결과적으로 공정 오차를 크게 줄일 수 있다. 또한, 실링 라인이 있는 부분은 접힘 없이 전지케이스의 수납부 외면에 위치하게 되므로 전지의 부피 감소 효과를 달성할 수 있다.That is, the battery cell according to the present invention includes two or more sealing lines parallel to the side sealing portion of the pouch-type battery case at intervals, that is, bends are formed between the sealing lines, that is, in the non-fused or low welded portions. By making it possible, the edge sealing portion of the battery case can be smoothly bent, and thus the position of the bent portion can be accurately set and processed, and as a result, the process error can be greatly reduced. In addition, the portion with the sealing line is located on the outer surface of the storage portion of the battery case without folding can achieve the effect of reducing the volume of the battery.
따라서, 종래에 라미네이트 시트로 이루어진 파우치형 이차전지를 밀봉하는 경우에, 실링부의 모든 면적을 균일하게 열융착함으로써 실란트 층의 폴리머가 필요 이상으로 용융됨에 따라, 실링 후 굳어진 폴리머로 인해 실링부의 절곡이 어려웠던 문제점을 해결할 수 있게 되었다.Therefore, in the case of sealing a pouch type secondary battery made of a laminate sheet conventionally, as the polymer of the sealant layer is melted more than necessary by uniformly heat-sealing all areas of the sealing portion, bending of the sealing portion is caused by the polymer hardened after sealing. The problem was difficult to solve.
본 발명에 따른 전지셀은 전극조립체가 장착되는 수납부의 외주면에 전지케이스의 밀봉을 위한 열융착 실링부가 형성되어 있는 전지셀로서, 수납부의 외주면과 평행하도록 실링 라인이 형성되어 있으므로, 장방형의 판상형 구조로 이루어져 있다.The battery cell according to the present invention is a battery cell in which a heat-sealed sealing part for sealing a battery case is formed on an outer circumferential surface of an accommodating part in which an electrode assembly is mounted. It consists of a plate-like structure.
이 때, 상기 전지케이스는 수분 침투 방지, 전해액 등의 누액 방지, 밀봉시의 기밀성 제공 등을 목적으로 수지층과 금속층을 포함하는 시트형 구조로 이루어져 있다. 하나의 구체적인 예에서, 전지케이스는 금속층과 수지층을 포함하는 라미네이트 시트로 구성될 수 있으며, 전극조립체가 수납되는 수납부가 형성되어 있는 제 1 케이스, 및 상기 수납부를 덮는 구조로서 외주면이 제 1 케이스의 외주면과 열융착되어 밀봉되는 제 2 케이스로 구성될 수 있다. 또한, 상기 제 1 케이스 및 제 2 케이스는 각각 독립적인 부재들이거나, 또는 일측 단부가 결합되어 있는 1 단위의 부재일 수 있다. 이러한 라미네이트 시트의 대표적인 예로는 양 외면에 수지층이 형성되어 있는 알루미늄 라미네이트 시트를 들 수 있다.At this time, the battery case has a sheet-like structure including a resin layer and a metal layer for the purpose of preventing water penetration, preventing leakage of an electrolyte solution, and providing airtightness during sealing. In one specific example, the battery case may be composed of a laminate sheet including a metal layer and a resin layer, the first case is formed with an accommodating portion for accommodating the electrode assembly, and a structure covering the accommodating portion, the outer peripheral surface of the first case It may be composed of a second case which is heat-sealed and sealed with the outer peripheral surface of the. In addition, each of the first case and the second case may be independent members or one unit member having one end coupled thereto. Representative examples of such laminate sheets include aluminum laminate sheets having resin layers formed on both outer surfaces thereof.
본 발명에 따른 전지셀은, 전지케이스의 외주면 측면 실링부에 실링 라인들이 형성되어 있다. 상기 실링 라인들 사이에서 실링부의 절곡이 용이하게 이루어지기 위해서는 실링 라인들 사이에 일정한 폭이 형성되어야 하고, 이 때, 실링 라인의 형상은 특별히 한정되지는 않지만, 바람직하게는 수납부의 외주면과 평행한 직선 형상으로 이루어 질 수 있다.In the battery cell according to the present invention, sealing lines are formed on an outer circumferential side sealing portion of the battery case. In order to easily bend the sealing portion between the sealing lines, a certain width must be formed between the sealing lines. At this time, the shape of the sealing line is not particularly limited, but is preferably parallel to the outer circumferential surface of the housing part. It can be made in one straight shape.
또한, 상기 실링 라인들의 폭은 서로 동일하게 형성될 수 있는 바, 이와 같이 실링 라인들의 폭이 서로 동일한 경우에는, 절곡부의 위치를 정확하게 설정 및 가공이 가능하여 공정 오차를 크게 줄일 수 있으며, 셀 제작 이후의 품질 검사 과정에서 실링 라인의 개수 검사를 통해 실링부의 면적 균일성도 쉽게 평가할 수 있으므로 공정의 정확도와 신속도를 향상시킬 수 있다.In addition, the widths of the sealing lines may be formed to be identical to each other. Thus, when the widths of the sealing lines are identical to each other, the bent portion may be accurately set and processed, thereby greatly reducing the process error. In the subsequent quality inspection, it is possible to easily evaluate the area uniformity of the sealing portion by inspecting the number of sealing lines, thereby improving the accuracy and speed of the process.
한편, 실링부는 절곡 후 수납부 측면과 대면하는 부위에 위치하게 되므로, 실링 라인들의 폭은 수납부의 높이보다 좁은 것이 바람직하며, 하나의 구체적인 예에서, 실링 라인들의 폭은 상대적으로 내측 실링 라인의 폭이 외측 실링 라인의 폭보다 넓게 형성될 수 있으며, 반대로, 상대적으로 외측 실링 라인의 폭이 내측 실링 라인의 폭보다 넓게 형성될 수도 있다.On the other hand, since the sealing portion is located at a portion facing the accommodating side after bending, the width of the sealing lines is preferably narrower than the height of the accommodating portion, in one specific example, the width of the sealing lines is relatively of the inner sealing line The width may be formed wider than the width of the outer sealing line, on the contrary, the width of the outer sealing line may be formed relatively wider than the width of the inner sealing line.
더욱 구체적으로, 상기 실링 라인 각각의 폭은, 절곡의 횟수, 절곡 방향 및 라미네이트 시트의 두께 등을 고려하여 다양하게 구성될 수 있는 바, 실링 라인이 형성되어 있는 외주면 실링부의 폭을 기준으로 10% 내지 45%의 크기 내에서 적절하게 선택될 수 있다. 그러나, 실링 라인의 폭이 실링부의 폭을 기준으로 10% 미만이라면 실링 강도가 떨어져서 안전성이 문제될 수 있으며, 45%보다 넓다면 실링부의 용이한 절곡으로 전지의 부피 감소 효과를 달성하기 어려우므로 바람직하지 않다.More specifically, the width of each of the sealing lines may be variously configured in consideration of the number of bendings, the bending direction, the thickness of the laminate sheet, and the like, 10% based on the width of the outer circumferential surface sealing portion where the sealing lines are formed. And may be appropriately selected within a size of 45%. However, if the width of the sealing line is less than 10% based on the width of the sealing portion, the sealing strength may be deteriorated and safety may be a problem. If the width is larger than 45%, it is difficult to achieve the effect of reducing the volume of the battery due to easy bending of the sealing portion. Not.
본 발명에 따른 전지셀에서, 상기 실링 라인들의 이격 거리는, 실링 라인의 폭에 비하여 좁은 것이 바람직한 바, 구체적으로 실링 라인들의 평균 폭 크기에 대해 10% 내지 100% 크기일 수 있으며, 실링 라인들의 평균 폭 크기에 대해 10% 미만이라면 라미네이트 시트의 두께로 인해 용이하게 절곡이 일어나기 어렵고, 100% 보다 크다면 절곡부의 위치를 정확하게 설정 및 가공하는 데 어려움이 있으므로 바람직하지 않다. In the battery cell according to the present invention, the separation distance of the sealing lines is preferably narrower than the width of the sealing line, specifically, may be 10% to 100% of the size of the average width of the sealing lines, the average of the sealing lines If the width is less than 10%, it is difficult to bend easily due to the thickness of the laminate sheet, and if it is greater than 100%, it is not preferable because it is difficult to accurately set and process the bent portion.
또한, 상기 실링 라인 부분은 열융착이 일어난 부분이며, 실링 라인들 사이 부분에서는 실링부의 절곡이 이루어지는 바, 상기 실링 라인들 사이 부분은 열융착이 일어나지 않는 미융착부를 형성할 수 있다. 이와 같이, 실링 라인과 미융착부가 반복하여 교대로 형성되는 바, 실링 라인은 열융착에 의한 압력에 의하여 미융착부에 비하여 수직 단부의 두께가 더 얇게 형성된다.In addition, the sealing line portion is a portion where heat fusion has occurred, the sealing portion is bent in the portion between the sealing line, the portion between the sealing line may form an unsealed portion in which the heat fusion does not occur. As described above, the sealing line and the unfused portion are repeatedly formed, and thus the sealing line has a thinner thickness at the vertical end portion than the unfused portion due to the pressure caused by the heat welding.
또 하나의 구체적인 예에서, 본 발명의 전지셀을 제조하기 위한 열융착 과정에서, 높은 온도와 압력에 의해 전지케이스의 내부 실란트층이 용융되어 실링이 일어나는 바, 상기 용융된 내부 실란트층이 실링 라인들 사이로 흘러내려 약한 강도의 융착이 일어날 수 있다. 따라서, 상기 실링 라인들 사이는 실링 라인과 비교하여 열융착도가 낮은 저융착부가 형성될 수 있다.In another specific example, in the heat fusion process for manufacturing the battery cell of the present invention, the inner sealant layer of the battery case is melted by a high temperature and pressure to seal the bar, the molten inner sealant layer is a sealing line Flowing between them may result in weak strength fusion. Therefore, a low fusion portion having a low heat fusion degree may be formed between the sealing lines as compared with the sealing line.
더욱 구체적으로, 상기 저융착부의 열융착도는 실링 라인의 열융착도에 대해 5% 내지 90% 크기의 범위 내에서 적절하게 선택될 수 있다.More specifically, the heat fusion degree of the low fusion portion may be appropriately selected within the range of 5% to 90% size with respect to the heat fusion degree of the sealing line.
이 때, 저융착부의 열융착도가 실링 라인의 열융착도에 대해 90%보다 큰 경우에는, 실링 라인들 사이의 저융착부에서 외주면 실링부가 용이하게 절곡되도록 하기 위한 본 발명의 목적을 달성하기 어려우므로 바람직하지 않다.At this time, when the thermal fusion degree of the low fusion portion is greater than 90% of the thermal fusion degree of the sealing line, to achieve the object of the present invention to easily bend the outer peripheral surface sealing portion at the low fusion between the sealing lines It is not desirable because it is difficult.
또 하나의 구체적인 예에서, 실링 라인은 저융착부의 형성으로 인해 밀봉성이 저하되는 것을 방지하기 위해 더 높은 융착 강도가 요구되는 바, 상기 실링 라인의 열융착 온도는 저융착부의 열융착 온도보다 높게 형성될 수 있다.In another specific example, the sealing line requires a higher welding strength in order to prevent the sealing property from deteriorating due to the formation of the low welding portion, the heat welding temperature of the sealing line is higher than the heat welding temperature of the low welding portion Can be formed.
본 발명의 전지셀에 있어서, 실링 라인들의 개수는 전지셀의 사용목적 및 사용대상에 따라 2 이상으로 형성될 수 있으며, 전해액 누액 등으로부터의 안전성을 고려하여 밀봉성을 저하시키지 않기 위하여, 적어도 수납부 외주면 부위 및 실링부 외주면 최외곽에 형성되는 것이 바람직하다.  In the battery cell of the present invention, the number of sealing lines may be formed in two or more according to the purpose of use and the object of use of the battery cell, in order not to reduce the sealing property in consideration of safety from electrolyte leakage, etc. It is preferable that it is formed in the outermost part of a payment outer peripheral surface and the outer peripheral surface of a sealing part.
하나의 구체적인 예에서, 상기 실링 라인들은 수납부에 인접한 순서로 제 1 실링 라인, 제 2 실링 라인 및 제 3 실링 라인을 포함하고 있고, 상기 제 1 실링 라인과 제 2 실링 라인 사이의 제 1 절곡부, 및 상기 제 2 실링 라인과 제 3 실링 라인 사이의 제 2 절곡부를 포함할 수 있다.In one specific example, the sealing lines include a first sealing line, a second sealing line and a third sealing line in an order adjacent to a receiving portion, and a first bending line between the first sealing line and the second sealing line. And a second bent portion between the second sealing line and the third sealing line.
이 때, 상기 제 2 절곡부는 제 3 실링 라인이 제 2 실링 라인과 대면하도록 절곡되어 있을 수 있으므로, 제 2 절곡부에서 제 3 실링 라인이 수납부 방향으로 180도 절곡되어 이웃하는 제 2 실링 라인과 대면하게 된다. In this case, since the third sealing line may be bent such that the third sealing line faces the second sealing line, the second sealing line may be bent by 180 degrees in the direction of the storage part in the second bending part, and thus the second sealing line may be adjacent to the second sealing line. Face to face.
또한, 전지셀의 부피를 줄이기 위해서 실링부를 2회 이상 절곡할 수도 있는 바, 상기 제 2 절곡부가 절곡된 상태에서, 제 1 절곡부는 제 2 실링 라인에 대한 제 3 실링 라인의 대향면이 수납부의 측면에 대면하도록 절곡되어 있을 수 있다.In addition, the sealing part may be bent two or more times in order to reduce the volume of the battery cell. In the state in which the second bent part is bent, the first bent part is provided with an opposing surface of the third sealing line with respect to the second sealing line. It may be bent to face the side of the.
따라서, 더욱 컴팩트한 구조의 전지셀을 얻을 수 있을 뿐만 아니라, 절곡부의 위치를 정확하게 설정 및 가공이 가능하여 공정 오차를 크게 줄일 수 있다.Therefore, not only a battery cell having a more compact structure can be obtained, but also the position of the bent portion can be accurately set and processed, thereby greatly reducing the process error.
본 발명은 또한, 전지셀의 외주면을 실링하는 장치로서,The present invention also provides a device for sealing the outer peripheral surface of the battery cell,
전지케이스의 외주면 실링 예정부의 상면을 하향 가압하면서 고온을 인가하는 상부 실링 툴(sealing tool); 및 An upper sealing tool for applying high temperature while pressing down the upper surface of the sealing portion of the outer circumferential surface of the battery case; And
전지케이스의 외주면 실링 예정부의 하면을 지지하는 하부 실링 툴(sealing tool);을 포함하고 있고, It includes a lower sealing tool (sealing tool) for supporting the lower surface of the outer peripheral surface sealing scheduled portion of the battery case,
상기 상부 실링 툴 및 하부 실링 툴 중의 적어도 하나에는 외주면 실링부에 실링 라인들을 형성하는 둘 이상의 선형 돌기들이 형성되어 있는 구조로 구성되어 있다.At least one of the upper sealing tool and the lower sealing tool has a structure in which two or more linear protrusions forming sealing lines are formed on the outer circumferential sealing portion.
상기와 같은 구조의 실링 장치는, 상부 실링 툴뿐만 아니라 하부 실링 툴에서도 열을 인가하는 역할을 할 수 있으며, 전지케이스의 열융착시에, 실링 툴에 형성된 선형 돌기들의 형상대로 전지셀의 외주면 실링부에 실링 라인이 형성되도록 하여, 실링 라인들 사이에서 실링부의 절곡이 용이한 전지셀을 제공할 수 있다.The sealing device having the structure as described above may serve to apply heat not only to the upper sealing tool but also to the lower sealing tool, and at the time of thermal fusion of the battery case, sealing the outer circumferential surface of the battery cell in the form of linear protrusions formed in the sealing tool. By forming a sealing line in the portion, it is possible to provide a battery cell that is easy to bend the sealing portion between the sealing lines.
이 때, 상기 선형 돌기들은 수직 단면 상으로 외주면 실링 예정부에 접하는 단부가 평면 또는 곡면일 수 있는데, 실링부의 밀봉성을 고려한다면 평면 단부가 적절할 수 있고, 내부 실란트층의 용융 및 흘러내림으로 인한 저융착부 형성 방지를 고려한다면 곡면 단부가 적절할 수 있다.At this time, the linear protrusions may be flat or curved at the end contacting the outer circumferential sealing part on a vertical cross section, and considering the sealing property of the sealing part, the flat end may be appropriate, and due to melting and flowing down of the inner sealant layer, Curved ends may be appropriate, given the prevention of low fusion formation.
본 발명은 또한, 전지셀의 외주면을 실링하는 장치로서, The present invention also provides a device for sealing the outer peripheral surface of the battery cell,
전지케이스의 외주면 실링 예정부의 상면을 하향 가압하면서 고온을 인가하는 상부 실링 툴(sealing tool); 및An upper sealing tool for applying high temperature while pressing down the upper surface of the sealing portion of the outer circumferential surface of the battery case; And
전지케이스의 외주면 실링 예정부의 하면을 지지하는 하부 실링 툴(sealing tool);을 포함하고 있고,It includes a lower sealing tool (sealing tool) for supporting the lower surface of the outer peripheral surface sealing scheduled portion of the battery case,
상기 상부 실링 툴 및 하부 실링 툴 중의 적어도 하나에는 외주면 실링부에 실링 라인들을 형성하는 둘 이상의 선형 열선들이 내장되어 있는 구조로 구성되어 있다.At least one of the upper sealing tool and the lower sealing tool has a structure in which two or more linear hot wires forming sealing lines are formed in the outer peripheral sealing portion.
상기와 같은 구조의 실링 장치는, 상부 실링 툴뿐만 아니라 하부 실링 툴에서도 열을 인가하는 역할을 할 수 있으며, 상기 실링 툴에 선형 돌기들이 형성되어 있는 실링 장치와 동일한 목적을 갖고, 동일한 효과를 발휘할 수 있으나, 선형 돌기들이 형성되는 위치에 선형 열선들을 내장함으로써, 실링 라인에만 고온으로 열융착이 가능하고, 열융착 온도의 설정 및 조절이 보다 용이하다. 또한, 별도의 선형 돌기의 형성이 없더라도, 실링 툴에 열선을 추가함으로써 보다 용이하게 본 발명의 효과를 달성할 수 있다.The sealing device having the above structure can serve to apply heat not only to the upper sealing tool but also to the lower sealing tool, and has the same purpose as the sealing device in which the linear protrusions are formed on the sealing tool, and have the same effect. However, by embedding the linear hot wires in the position where the linear protrusions are formed, it is possible to heat fusion at a high temperature only to the sealing line, and it is easier to set and adjust the heat fusion temperature. In addition, even without the formation of a separate linear protrusion, it is possible to achieve the effect of the present invention more easily by adding a hot wire to the sealing tool.
본 발명은 또한, 상기 전지셀을 단위 전지로 포함하는 전지모듈을 제공하고, 상기 전지모듈을 포함하는 전지팩을 제공한다.The present invention also provides a battery module including the battery cell as a unit battery, and provides a battery pack including the battery module.
본 발명은 또한, 상기 전지팩을 전원으로 포함하고 있는 디바이스를 제공한다. The present invention also provides a device including the battery pack as a power source.
구체적으로, 상기 전지팩은 고온 안전성 및 긴 사이클 특성과 높은 레이트 특성 등이 요구되는 디바이스의 전원으로 사용될 수 있으며, 이러한 디바이스의 상세한 예로는 스마트폰, 휴대폰, 노트북, 테블릿 컴퓨터, 노트북 컴퓨터 또는 전지 기반 모터에 의해 동력을 받아 움직이는 파워 툴(power tool); 전기자동차(Electric Vehicle, EV), 하이브리드 전기자동차(Hybrid Electric Vehicle, HEV), 플러그-인 하이브리드 전기자동차(Plug-in Hybrid Electric Vehicle, PHEV) 등을 포함하는 전기차; 전기 자전거(E-bike), 전기 스쿠터(E-scooter)를 포함하는 전기 이륜차; 전기 골프 카트(electric golf cart); 전력저장용 시스템 등으로부터 선택되는 것일 수 있으나, 이에 한정되는 것은 아니다.Specifically, the battery pack may be used as a power source for devices requiring high temperature stability, long cycle characteristics, high rate characteristics, and the like, and specific examples of such devices include smartphones, mobile phones, laptops, tablet computers, notebook computers, or batteries. A power tool driven by a base motor and moving; Electric vehicles including electric vehicles (EVs), hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (PHEVs), and the like; Electric motorcycles including electric bicycles (E-bikes) and electric scooters (E-scooters); Electric golf carts; It may be selected from the system for power storage, but is not limited thereto.
이들 디바이스의 구조 및 그것의 제작 방법은 당업계에 공지되어 있으므로, 본 명세서에서는 그에 대한 자세한 설명은 생략한다.Since the structure of these devices and their fabrication methods are known in the art, detailed description thereof is omitted herein.
도 1은 종래의 대표적인 파우치형 이차전지의 분해 사시도이다;1 is an exploded perspective view of a typical representative pouch type secondary battery;
도 2는 종래의 파우치형 이차전지의 실링 상태를 나타낸 사시도이다;2 is a perspective view showing a sealing state of a conventional pouch type secondary battery;
도 3은 본 발명의 하나의 실시예에 따른 실링 라인이 형성되어 있는 전지셀의 투시 평면도이다;3 is a perspective plan view of a battery cell in which a sealing line is formed according to one embodiment of the present invention;
도 4는 도 3에서 A 부위에 대한 확대도이다;4 is an enlarged view of a portion A in FIG. 3;
도 5는 도 4에서 선 B-B의 수직 단면도이다;5 is a vertical cross-sectional view of the line B-B in FIG. 4;
도 6은 종래의 파우치형 이차전지와 그것의 실링부 확대도 및 본 발명의 실시예에 따른 전지셀의 실링부 확대사진이다;6 is an enlarged view of a conventional pouch type secondary battery and its sealing portion and an enlarged photograph of a sealing portion of a battery cell according to an embodiment of the present invention;
도 7은 본 발명의 하나의 실시예에 따른 파우치형 전지셀의 부분 정면도이다;7 is a partial front view of a pouch-type battery cell according to an embodiment of the present invention;
도 8은 종래의 파우치형 이차전지 및 본 발명의 실시예에 따른 전지셀의 절곡 후 비교사진이다;8 is a comparison photograph after bending of a conventional pouch-type secondary battery and a battery cell according to an embodiment of the present invention;
도 9는 본 발명의 하나의 실시예에 따른 실링 장치의 정면도이다; 및9 is a front view of a sealing apparatus according to one embodiment of the present invention; And
도 10은 본 발명의 다른 하나의 실시예에 따른 실링 장치의 정면도이다.10 is a front view of a sealing apparatus according to another embodiment of the present invention.
이하에서는, 본 발명의 실시예에 따른 도면을 참조하여 설명하지만, 이는 본 발명의 더욱 용이한 이해를 위한 것으로, 본 발명의 범주가 그것에 의해 한정되는 것은 아니다.Hereinafter, although described with reference to the drawings according to an embodiment of the present invention, this is for easier understanding of the present invention, the scope of the present invention is not limited thereto.
도 2에는 본 발명의 하나의 실시예에 따른 실링 라인이 형성되어 있는 전지셀이 도시되어 있다.2 illustrates a battery cell in which a sealing line according to an embodiment of the present invention is formed.
도 2는 전극 탭과 전극 리드가 연결된 구조의 전극 단자가 일단과 타단에 각각 형성되어 있는 구조의 파우치형 전지셀을 도시하고 있으나, 전극 단자가 일단에 함께 형성되어 있는 구조의 파우치형 전지셀 등도 포함되는 것은 물론이다.2 illustrates a pouch-type battery cell having a structure in which electrode terminals having a structure in which electrode tabs and electrode leads are connected to one end and the other end, respectively, but also have a pouch-type battery cell in which electrode terminals are formed together at one end. Of course it is included.
도 3을 참조하면, 본 발명에 따른 전지셀(200)은 전극조립체가 장착되는 수납부(201)의 외주면에 전지케이스의 밀봉을 위한 열융착 실링부가 형성되어 있고, 전극 단자들(210, 220)은 상단 실링부(204) 및 하단 실링부(205)에 위치하며, 상기 상단 실링부(204) 및 하단 실링부(205)에 인접한 양 측면 실링부들(202, 203)에는 상호 평행하도록 이격되어 있는 둘 이상의 실링 라인들(230)이 형성되어 있다. 이 때, 상기 실링 라인들(230)은 전지케이스의 길이 방향으로 상단 실링부(204)의 외주 단부로부터 하단 실링부(205)의 외주 단부까지 연속적으로 형성되어 있다. 실링 라인들 사이에서 절곡이 용이하게 일어날 수 있는 전지셀을 제공하기 위한 본 발명의 목적을 고려할 때, 실링 라인들은 수납부 길이와 상응하는 길이로 한정되지 않고 상단 및 하단 실링부의 외주 단부까지 연장되는 것이 바람직하다.Referring to FIG. 3, the battery cell 200 according to the present invention has a heat-sealed sealing part for sealing the battery case on the outer circumferential surface of the accommodating part 201 in which the electrode assembly is mounted, and the electrode terminals 210 and 220. ) Is positioned at the upper sealing portion 204 and the lower sealing portion 205, and the side sealing portions 202 and 203 adjacent to the upper sealing portion 204 and the lower sealing portion 205 are spaced parallel to each other. Two or more sealing lines 230 are formed. In this case, the sealing lines 230 are continuously formed in the longitudinal direction of the battery case from the outer peripheral end of the upper sealing part 204 to the outer peripheral end of the lower sealing part 205. In view of the object of the present invention for providing a battery cell in which bending can easily occur between the sealing lines, the sealing lines are not limited to the length corresponding to the length of the receiving portion but extend to the outer peripheral ends of the upper and lower sealing portions. It is preferable.
도 4는 도 3의 A부분의 확대도를 도시하고 있다.4 is an enlarged view of portion A of FIG. 3.
도 4를 참조하면, 전지케이스 수납부(201)의 외주면 측면 실링부에는 다수개의 실링 라인들이 직선 형상으로 형성되어 있다. 이 때, 실링 라인들은 열융착이 일어난 부분(232)과 열융착이 일어나지 않은 미융착부(231)가 교대로 반복하여 위치하며, 상기 미융착부는 융착이 전혀 일어나지 않은 부분일 수 있으나, 실링 라인과 비교하여 열융착도가 낮은 저융착부일 수도 있다.Referring to FIG. 4, a plurality of sealing lines are formed in a straight shape on the outer circumferential side sealing part of the battery case accommodating part 201. In this case, the sealing lines may be alternately positioned in the heat-sealed portion 232 and the non-fused portion 231 which is not heat-sealed alternately, the un-fused portion may be a portion in which no fusion occurs at all, but the sealing line It may be a low fusion portion having a low thermal fusion in comparison with the above.
또한, 모든 실링 라인들의 폭(L)이 동일할 수도 있고, 다를 수도 있다. 예를 들어, 수납부(201)쪽에 형성된 내측 실링 라인의 폭이 외측 실링 라인의 폭보다 넓을 수도 있으며, 반대로, 외측 실링 라인의 폭이 내측 실링 라인의 폭보다 넓을 수도 있다. 만약, 모든 실링 라인들의 폭이 동일한 경우에는, 셀 제작 이후의 품질 검사 과정에서 실링 라인의 개수 검사를 통해 실링부의 면적 균일성을 쉽게 평가할 수 있다는 장점이 있으나, 라미네이트 시트의 두께 및 실링부 폭을 고려한 절곡 횟수를 감안하여 실링 라인들의 폭에 차별을 둘 수 있다.In addition, the width L of all the sealing lines may be the same or may be different. For example, the width of the inner sealing line formed on the accommodating portion 201 side may be wider than the width of the outer sealing line, and conversely, the width of the outer sealing line may be wider than the width of the inner sealing line. If all the sealing lines have the same width, there is an advantage that the area uniformity of the sealing portion can be easily evaluated through the number inspection of the sealing lines in the quality inspection process after fabrication of the cell, but the thickness of the laminate sheet and the sealing portion width Considering the number of bends considered, the width of the sealing lines can be differentiated.
이 때, 실링 라인 각각의 폭은 실링 라인이 형성되어 있는 외주면 실링부의 폭(W)을 중심으로 10% 내지 45%의 크기에서 적절하게 선택될 수 있다.At this time, the width of each of the sealing lines may be appropriately selected in the size of 10% to 45% based on the width W of the outer peripheral surface sealing portion in which the sealing lines are formed.
한편, 상기 실링 라인들 사이에서는 실링부의 절곡이 일어나므로, 이 부분은 비교적 가늘게 형성되는 것이 적절한 바, 바람직하게는, 미융착부 또는 저융착부의 폭인 실링 라인들의 이격 거리(L과 L사이의 거리)는 실링 라인의 폭에 비하여 좁게 형성될 수 있으며, 구체적으로는 실링 라인들의 평균 폭 크기에 대해 10% 내지 100% 크기로 형성될 수 있다.On the other hand, since the bending of the sealing portion occurs between the sealing lines, it is appropriate that this portion is formed relatively thin, preferably, the distance between the sealing lines (L and L between the unmelted portion or the low fused portion width) ) May be narrower than the width of the sealing line, specifically, may be formed in a size of 10% to 100% with respect to the average width of the sealing lines.
한편, 도 5에는 도 4의 선 B-B를 따라 절단한 경우의 수직단면도를 도시하고 있는 바, 열융착이 일어난 실링 라인 부분(232)은 실링부 외주면의 수직 단면상 두께가 상대적으로 얇아지고, 실링 라인 사이의 미융착부 또는 저융착부(231)는 상대적으로 두께가 두꺼워 짐을 확인할 수 있다.On the other hand, Figure 5 shows a vertical cross-sectional view in the case of cutting along the line BB of Figure 4, the sealing line portion 232 in which the heat fusion has been relatively thin in the vertical cross-section of the outer peripheral surface of the sealing portion, sealing line It can be seen that the non-fused portion or the low fusion portion 231 is relatively thick in thickness.
한편, 도 6은 종래의 파우치형 이차전지(a)와 그것의 실링부 확대사진(b) 및 본 발명의 실시예에 따른 전지셀의 실링부 확대사진(c)을 도시하고 있는바, 종래의 실링부 확대사진(b)에서는 실링부의 표면이 매끄럽게 표현되어 있지만, 실링 라인을 형성한 본 발명(c)은 직선형의 실링 라인을 형성하는 미융착부 또는 저융착부가 교대로 반복하여 표현되어 있다.On the other hand, Figure 6 shows a conventional pouch-type secondary battery (a) and its sealing portion enlarged picture (b) and the sealing portion enlarged picture (c) of the battery cell according to an embodiment of the present invention, the conventional Although the surface of a sealing part is smoothly represented in the sealing part enlarged photograph (b), in this invention (c) which formed the sealing line, the unfused part or the low fusion part which forms a linear sealing line is alternately represented repeatedly.
도 7은 본 발명의 하나의 실시예에 따른 파우치형 전지셀의 절곡 과정을 도시하고 있다.7 illustrates a bending process of a pouch-type battery cell according to an embodiment of the present invention.
도 7을 참조하면, 측면 실링부에 생기는 실링 라인들은 수납부(310)에 인접한 순서로 제 1 실링 라인(311), 제 2 실링 라인(312) 및 제 3 실링 라인(313)을 포함하고 있고, 상기 제 1 실링 라인(311)과 제 2 실링 라인(312) 사이의 제 1 절곡부(321), 및 상기 제 2 실링 라인(312)과 제 3 실링 라인(313) 사이의 제 2 절곡부(322)를 포함하고 있다.Referring to FIG. 7, the sealing lines generated in the side sealing part include the first sealing line 311, the second sealing line 312, and the third sealing line 313 in the order adjacent to the housing 310. A first bent portion 321 between the first sealing line 311 and a second sealing line 312, and a second bent portion between the second sealing line 312 and the third sealing line 313. 322 is included.
이 때, 제 2 절곡부(322)에서의 절곡으로 인해 제 3 실링 라인(313)이 제 2 실링 라인(312)과 대면하게 되고, 제 2 절곡부(322)가 절곡된 상태에서 제 1 절곡부(321)는 제 2 실링 라인(312)에 대한 제 3 실링 라인(313)의 대향면이 수납부(330)에 대면하도록 절곡된다. 이와 같은 방법으로, 불필요한 실링부가 1 회 혹은 2회 이상 절곡되도록 함으로써, 전지셀의 부피증가 문제를 해결할 수 있다.At this time, the third sealing line 313 faces the second sealing line 312 due to the bending at the second bent portion 322, and the first bent state in which the second bent portion 322 is bent. The portion 321 is bent such that an opposing surface of the third sealing line 313 with respect to the second sealing line 312 faces the receiving portion 330. In this way, the unnecessary sealing portion can be bent one or two times, thereby solving the problem of increasing the volume of the battery cell.
또한, 도 8은 종래의 파우치형 전지셀(a)과 본 발명의 실시예에 따른 전지셀(b)의 비교사진을 도시하고 있는 바, 본 발명과 같이 실링부의 일부에만 열융착이 일어나도록 실링 라인을 형성하는 경우, 전지셀의 절곡 단계에서 실링부가 균일하고 컴팩트하게 접어지는 효과를 얻을 수 있다.In addition, Figure 8 shows a comparison photo of the conventional pouch-type battery cell (a) and the battery cell (b) according to an embodiment of the present invention, as shown in the present invention to seal the heat fusion to only a part of the sealing portion In the case of forming a line, it is possible to obtain the effect of folding the sealing unit uniformly and compactly in the bending step of the battery cell.
도 9 및 도 10은 본 발명의 하나의 실시예에 따른 실링 장치를 도시하고 있다. 9 and 10 show a sealing apparatus according to an embodiment of the present invention.
먼저, 도 9를 참조하면, 전지셀의 외주면을 실링하는 장치(600)는 상부 실링 툴(611) 및 하부 실링 툴(612)을 포함하고 있으며, 상기 상부 실링 툴(611)은 전지케이스의 외주면 실링 예정부(620)의 상면을 하향 가압하면서 고온을 인가하는 역할을 하며, 하부 실링 툴(612)은 외주면 실링 예정부의 하면을 지지하고, 또한 열을 인가하는 역할을 할 수도 있다. 상기 상부 실링 툴(611) 및 하부 실링 툴(612) 중의 적어도 하나에는 둘 이상의 선형 돌기들(631)이 형성되어 있다. 상기 선형 돌기들(631)은 전지케이스의 외주면 실링 예정부(620)를 향하여 돌출되어 있으며 수직 단면 상으로 외주면 실링 예정부에 접하는 단부가 평면 또는 곡면으로 형성될 수 있다. 상기 실링 장치(600)를 이용하여 실링을 하는 경우, 라미네이트 시트를 구성하는 수지층(621), 금속층(622) 및 실란트층(623) 가운데, 실란트층(623)의 용융으로 인해 돌기들이 전지케이스의 실링부와 만나는 부분의 내부에서 실링이 이루어지게 된다. First, referring to FIG. 9, an apparatus 600 for sealing an outer circumferential surface of a battery cell includes an upper sealing tool 611 and a lower sealing tool 612, and the upper sealing tool 611 includes an outer circumferential surface of a battery case. It serves to apply a high temperature while pressing down the upper surface of the sealing scheduled portion 620, the lower sealing tool 612 may support a lower surface of the outer peripheral sealing plan portion, and may also serve to apply heat. At least one of the upper sealing tool 611 and the lower sealing tool 612 is formed with two or more linear protrusions 631. The linear protrusions 631 may protrude toward the outer circumferential surface sealing plan portion 620 of the battery case, and an end portion which contacts the outer circumferential surface sealing plan portion on a vertical cross section may be formed flat or curved. In the case of sealing using the sealing device 600, among the resin layer 621, the metal layer 622 and the sealant layer 623 constituting the laminate sheet, protrusions are formed by the melting of the sealant layer 623. Sealing is made inside the portion that meets the sealing of the.
한편, 도 10에 도시된 실링장치(700)는 상부 실링 툴(711) 및 하부 실링 툴(712)을 포함하고 있으며, 상기 상부 실링 툴(711)은 전지케이스의 외주면 실링 예정부(720)의 상면을 하향 가압하면서 고온을 인가하는 역할을 하며, 하부 실링 툴(712)은 외주면 실링 예정부의 하면을 지지하고, 또한 열을 인가하는 역할을 할 수도 있다. 상기 상부 실링 툴(711) 및 하부 실링 툴(712) 중의 적어도 하나에는 둘 이상의 선형 열선(731)이 내장되어 있다. 상기 열선은 실링 툴의 내부에 내장되어 있을 수 있으나, 실링 라인에 특히 고온을 가하여 더욱 안전성이 향상된 실링 라인을 형성하기 위해서는 실링 툴의 표면에 위치할 수도 있다.Meanwhile, the sealing apparatus 700 illustrated in FIG. 10 includes an upper sealing tool 711 and a lower sealing tool 712, and the upper sealing tool 711 of the outer peripheral sealing plan portion 720 of the battery case is included. It serves to apply a high temperature while pressing the upper surface downward, the lower sealing tool 712 may support the lower surface of the outer peripheral sealing plan portion, and may also serve to apply heat. At least one of the upper sealing tool 711 and the lower sealing tool 712 is embedded with two or more linear hot wires 731. The heating wire may be embedded in the sealing tool, but may be located on the surface of the sealing tool in order to form a sealing line having a higher safety by applying a particularly high temperature to the sealing line.
상기 실링 장치(700)를 이용하여 실링을 하는 경우, 라미네이트 시트를 구성하는 수지층(721), 금속층(722) 및 실란트층(723) 가운데, 실란트층(723)의 용융으로 인해 열선들이 전지케이스의 실링부와 만나는 부분의 내부에서 실링이 이루어지게 된다.When sealing using the sealing apparatus 700, among the resin layer 721, the metal layer 722 and the sealant layer 723 constituting the laminate sheet, the hot wires due to the melting of the sealant layer 723, the battery case Sealing is made inside the portion that meets the sealing of the.
본 발명이 속한 분야에서 통상의 지식을 가진 자라면 상기 내용을 바탕으로 본 발명의 범주에서 다양한 응용 및 변형을 행하는 것이 가능할 것이다.Those skilled in the art to which the present invention pertains will be able to perform various applications and modifications within the scope of the present invention based on the above contents.
이상에서 설명한 바와 같이, 본 발명에 따른 전지셀은 전극 단자들이 위치한 상단 실링부 또는 하단 실링부에 인접한 양 측면 실링부들 중의 적어도 하나에는, 상호 평행하도록 이격되어 있는 둘 이상의 실링 라인들을 형성함으로써, 실링 라인들 사이에서 융착이 되지 않은 미융착부에서 실링부의 절곡이 이루어지고 다른 부분은 접힘 없이 전지케이스의 수납부 외면에 위치하게 되므로 용이하게 절곡할 수 있을 뿐 아니라 전지의 부피 감소 효과를 발휘할 수 있다.As described above, the battery cell according to the present invention is formed by forming two or more sealing lines spaced apart from each other in at least one of the upper sealing portion on which the electrode terminals are located or both side sealing portions adjacent to the lower sealing portion. The sealing part is bent at the unfused part not welded between the lines, and the other part is located on the outer surface of the battery case without being folded, which can be easily bent and can reduce the battery volume. .
또한, 본 발명은 실링 라인에서 실링부의 절곡이 용이하게 이루어질 수 있으므로, 절곡부의 위치를 정확하게 설정 및 가공이 가능하여 공정 오차를 크게 줄일 수 있으며, 셀 제작 이후의 품질 검사 과정에서 실링 라인의 개수 검사를 통해 실링부의 면적 균일성도 쉽게 평가할 수 있으므로 공정의 정확도와 신속도를 향상시킬 수 있다.In addition, the present invention can be easily made bending of the sealing portion in the sealing line, it is possible to accurately set the position of the bending portion and processing can greatly reduce the process error, the number inspection of the sealing line in the quality inspection process after the cell fabrication The area uniformity of the sealing can also be easily assessed, improving the accuracy and speed of the process.

Claims (22)

  1. 수지층과 금속층을 포함하는 라미네이트 시트의 전지케이스에 전극조립체가 장착되어 있고, 상기 전지케이스에는 전극조립체가 장착되는 수납부의 외주면에 전지케이스의 밀봉을 위한 열융착 실링부(외주면 실링부)가 형성되어 있는 전지셀로서,The electrode assembly is mounted on a battery case of a laminate sheet including a resin layer and a metal layer, and the battery case has a heat sealing seal (outer peripheral surface sealing part) for sealing the battery case on the outer circumferential surface of the housing part in which the electrode assembly is mounted. As a battery cell formed,
    전극 단자들은 상단 실링부, 또는 하단 실링부, 또는 상단 및 하단 실링부에 위치하고 있고,The electrode terminals are located in the upper sealing portion, or the lower sealing portion, or the upper and lower sealing portions,
    상기 상단 또는 하단 실링부에 인접한 양 측면 실링부들 중의 적어도 하나에는, 상호 평행하도록 이격되어 있는 둘 이상의 실링 라인들이 형성되어 있으며,At least one of both side sealing parts adjacent to the upper or lower sealing part is formed with two or more sealing lines spaced apart from each other in parallel,
    상기 실링 라인들은 전지케이스의 길이 방향으로 상단 실링부의 외주 단부로부터 하단 실링부의 외주 단부까지 연속적으로 형성되고,The sealing lines are continuously formed from the outer peripheral end of the upper sealing part to the outer peripheral end of the lower sealing part in the longitudinal direction of the battery case,
    상기 실링 라인들이 형성되어 있는 외주면 실링부는 실링 라인들 사이에서 30도 내지 180도의 범위로 절곡되어 있는 것을 특징으로 하는 전지셀. The outer circumferential surface sealing portion in which the sealing lines are formed is bent in a range of 30 to 180 degrees between the sealing lines.
  2. 제 1 항에 있어서, 상기 전지셀은 장방형의 판상형 구조로 이루어져 있는 것을 특징으로 하는 전지셀. The battery cell according to claim 1, wherein the battery cell has a rectangular plate-like structure.
  3. 제 1 항에 있어서, 상기 전지케이스는, 전극조립체가 수납되는 수납부가 형성되어 있는 제 1 케이스, 및 상기 수납부를 덮는 구조로서 외주면이 제 1 케이스의 외주면과 열융착되어 밀봉되는 제 2 케이스로 구성되어 있는 것을 특징으로 하는 전지셀. The battery case of claim 1, wherein the battery case includes a first case in which an accommodating part is accommodated, and a second case in which an outer circumferential surface is heat-sealed and sealed with an outer circumferential surface of the first case. Battery cell characterized in that the.
  4. 제 3 항에 있어서, 상기 제 1 케이스 및 제 2 케이스는 각각 독립적인 부재들이거나, 또는 일측 단부가 결합되어 있는 1 단위의 부재인 것을 특징으로 하는 전지셀.The battery cell according to claim 3, wherein the first case and the second case are independent members, or one unit member to which one end portion is coupled.
  5. 제 1 항에 있어서, 상기 실링 라인들은 평면상으로 인접한 수납부의 외주면과 평행한 직선 형상으로 이루어져 있는 것을 특징으로 하는 전지셀.The battery cell of claim 1, wherein the sealing lines are formed in a straight line shape parallel to the outer circumferential surface of the storage unit adjacent to each other in a plane.
  6. 제 1 항에 있어서, 상기 실링 라인들의 폭은 서로 동일한 것을 특징으로 하는 전지셀.The battery cell of claim 1, wherein the sealing lines have the same width.
  7. 제 1 항에 있어서, 상기 실링 라인들의 폭은 상대적으로 내측 실링 라인의 폭이 외측 실링 라인의 폭보다 넓은 것을 특징으로 하는 전지셀.The battery cell of claim 1, wherein the width of the sealing lines is relatively wider than the width of the outer sealing line.
  8. 제 1 항에 있어서, 상기 실링 라인들의 폭은 상대적으로 외측 실링 라인의 폭이 내측 실링 라인의 폭보다 넓은 것을 특징으로 하는 전지셀.The battery cell of claim 1, wherein the width of the sealing lines is relatively wider than the width of the inner sealing line.
  9. 제 1 항에 있어서, 상기 실링 라인 각각의 폭은, 실링 라인이 형성되어 있는 외주면 실링부의 폭을 기준으로 10% 내지 45%의 크기인 것을 특징으로 하는 전지셀. The battery cell of claim 1, wherein each of the sealing lines has a width of 10% to 45% based on the width of the outer circumferential surface sealing portion in which the sealing lines are formed.
  10. 제 1 항에 있어서, 상기 실링 라인들의 이격 거리는 실링 라인들의 평균 폭 크기에 대해 10% 내지 100% 크기인 것을 특징으로 하는 전지셀. The method of claim 1, wherein the separation distance of the sealing line is a battery cell, characterized in that the size of 10% to 100% of the average width size of the sealing lines.
  11. 제 1 항에 있어서, 상기 실링 라인들 사이는 열융착이 되지 않은 미융착부인 것을 특징으로 하는 전지셀.The method of claim 1, wherein the sealing line between the battery cells, characterized in that the unsealed portion that is not heat-sealed.
  12. 제 1 항에 있어서, 상기 실링 라인들 사이는 실링 라인과 비교하여 열융착도가 낮은 저융착부인 것을 특징으로 하는 전지셀.The method of claim 1, wherein the sealing line between the battery cell, characterized in that the low heat-sealing portion is low heat fusion compared to the sealing line.
  13. 제 12 항에 있어서, 상기 저융착부의 열융착도는 실링 라인에 대해 5% 내지 90% 크기인 것을 특징으로 하는 전지셀.13. The battery cell of claim 12, wherein the thermal fusion degree of the low fusion portion is 5% to 90% with respect to the sealing line.
  14. 제 12 항에 있어서, 상기 실링 라인의 열융착 온도는 저융착부의 열융착 온도보다 높은 것을 특징으로 하는 전지셀. The battery cell according to claim 12, wherein the heat fusion temperature of the sealing line is higher than the heat fusion temperature of the low fusion portion.
  15. 제 1 항에 있어서, 상기 실링 라인들은 수납부에 인접한 순서로 제 1 실링 라인, 제 2 실링 라인 및 제 3 실링 라인을 포함하고 있고, 상기 제 1 실링 라인과 제 2 실링 라인 사이의 제 1 절곡부, 및 상기 제 2 실링 라인과 제 3 실링 라인 사이의 제 2 절곡부를 포함하고 있는 것을 특징으로 하는 전지셀.The sealing line of claim 1, wherein the sealing lines include a first sealing line, a second sealing line, and a third sealing line in an order adjacent to a receiving unit, and a first bending line between the first sealing line and the second sealing line. And a second bent portion between the second sealing line and the third sealing line.
  16. 제 15 항에 있어서, 상기 제 2 절곡부는 제 3 실링 라인이 제 2 실링 라인과 대면하도록 절곡되어 있는 것을 특징으로 하는 전지셀. The battery cell according to claim 15, wherein the second bent portion is bent such that the third sealing line faces the second sealing line.
  17. 제 16 항에 있어서, 상기 제 2 절곡부가 절곡된 상태에서, 제 1 절곡부는 제 2 실링 라인에 대한 제 3 실링 라인의 대향면이 수납부에 대면하도록 절곡되어 있는 것을 특징으로 하는 전지셀. The battery cell according to claim 16, wherein in the state in which the second bent portion is bent, the first bent portion is bent such that an opposing surface of the third sealing line with respect to the second sealing line faces the receiving portion.
  18. 제 1 항 내지 제 17 항 중 어느 하나에 따른 전지셀을 포함하고 있는 디바이스.A device comprising a battery cell according to any one of claims 1 to 17.
  19. 제 18 항에 있어서, 상기 디바이스는 휴대폰, 태블릿 컴퓨터, 노트북 컴퓨터, 파워 툴, 전기자동차, 하이브리드 전기자동차, 플러그-인 하이브리드 전기자동차, 또는 전력저장 장치인 것을 특징으로 하는 디바이스.19. The device of claim 18, wherein the device is a mobile phone, tablet computer, notebook computer, power tool, electric vehicle, hybrid electric vehicle, plug-in hybrid electric vehicle, or power storage device.
  20. 제 1 항에 따른 전지셀의 외주면을 실링하는 장치로서, An apparatus for sealing the outer peripheral surface of the battery cell according to claim 1,
    전지케이스의 외주면 실링 예정부의 상면을 하향 가압하면서 고온을 인가하는 상부 실링 툴(sealing tool); 및An upper sealing tool for applying high temperature while pressing down the upper surface of the sealing portion of the outer circumferential surface of the battery case; And
    전지케이스의 외주면 실링 예정부의 하면을 지지하는 하부 실링 툴(sealing tool);A lower sealing tool for supporting the lower surface of the outer peripheral surface sealing schedule portion of the battery case;
    을 포함하고 있고,It contains,
    상기 상부 실링 툴 및 하부 실링 툴 중의 적어도 하나에는 외주면 실링부에 실링 라인들을 형성하는 둘 이상의 선형 돌기들이 형성되어 있는 것을 특징으로 하는 전지셀 실링 장치.And at least one of the upper sealing tool and the lower sealing tool is formed with at least two linear protrusions forming sealing lines on the outer circumferential sealing portion.
  21. 제 20 항에 있어서, 상기 선형 돌기들은 수직 단면 상으로 외주면 실링 예정부에 접하는 단부가 평면 또는 곡면인 것을 특징으로 하는 전지셀 실링 장치.21. The battery cell sealing apparatus according to claim 20, wherein the linear protrusions have a flat or curved end portion in contact with an outer peripheral sealing plan portion on a vertical cross section.
  22. 제 1 항에 따른 전지셀의 외주면을 실링하는 장치로서,An apparatus for sealing the outer peripheral surface of the battery cell according to claim 1,
    전지케이스의 외주면 실링 예정부의 상면을 하향 가압하면서 고온을 인가하는 상부 실링 툴(sealing tool); 및An upper sealing tool for applying high temperature while pressing down the upper surface of the sealing portion of the outer circumferential surface of the battery case; And
    전지케이스의 외주면 실링 예정부의 하면을 지지하는 하부 실링 툴(sealing tool);A lower sealing tool for supporting the lower surface of the outer peripheral surface sealing schedule portion of the battery case;
    을 포함하고 있고,It contains,
    상기 상부 실링 툴 및 하부 실링 툴 중의 적어도 하나에는 외주면 실링부에 실링 라인들을 형성하는 둘 이상의 선형 열선들이 내장되어 있는 것을 특징으로 하는 전지셀 실링 장치.And at least one of the upper sealing tool and the lower sealing tool includes two or more linear hot wires forming sealing lines on the outer circumferential sealing portion.
PCT/KR2015/000950 2014-02-27 2015-01-29 Battery cell comprising circumferential surface sealing part having sealing line, and battery cell sealing device for producing same WO2015130017A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201580010855.5A CN106062992B (en) 2014-02-27 2015-01-29 Battery with the external margin hermetic unit with seal line and the cell sealing equipment for manufacturing the battery
EP15754570.8A EP3098877B1 (en) 2014-02-27 2015-01-29 Battery cell comprising circumferential surface sealing part having sealing line
US15/121,914 US10622597B2 (en) 2014-02-27 2015-01-29 Battery cell having outer edge sealed portion with sealed lines and battery cell sealing apparatus for manufacture thereof
JP2016553627A JP6407297B2 (en) 2014-02-27 2015-01-29 BATTERY CELL CONTAINING OUTER PERIPHERAL SEALING PORTION FORMED WITH SEALING LINE AND BATTERY CELL SEALING DEVICE FOR PRODUCING THE SAME

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KR1020140022981A KR102042018B1 (en) 2014-02-27 2014-02-27 Battery Cell Having Outer Circumferential Sealing Portion with Sealing Line, and Device for Manufacture thereof
KR10-2014-0022981 2014-02-27

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US20170012252A1 (en) 2017-01-12
CN106062992A (en) 2016-10-26
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KR102042018B1 (en) 2019-11-07
CN106062992B (en) 2019-01-11

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